Though this film was inspired by Hergé's "Tintin" stories, the screenplay was not based on any of his comic books. It was written by the Belgian comics creator Greg (Michel Regnier), a friend of Hergé. It was later adapted into a comic book with still images from the film used as illustrations.
Laszlo Carreidas from Flight 714 can be seen at the airport asleep.
Most of the under water base is based on Dr. No's base from the first James Bond movie.
The extra information about the air taxi ride given by the stewardess to Tintin at the airport is only heard in the English and Portuguese dubs.
Hergé planned to stage the plane crash like the fall of the truck in Steven Spielberg's Duel and it didn't happen due to budget limitations.